Bradford crouched on the field in pain before limping off toward the locker room with a pair of team trainers. The fifth-year signal-caller finished the game having completed 4 of 9 passes for 77 yards.

Rams coach Jeff Fisher was "very optimistic" after the game, saying "it appeared just to be a hyperextension."

A Rams source tells NFL Media Insider Ian Rapoport that the first tests on Bradford's knee were inconclusive and Bradford underwent an MRI on Sunday. He's undergoing more tests now, and Fisher is expected to update Bradford's status during a 6:30 p.m. ET news conference.